Tire-gage.



A. E. POLLOCK.

TIRE GAGE.

APPLICATION FILED FEB. I9, 19|?.

Patented Mar. 20, 1917.

' tire gages vand has hereinafter-"set forth are attained bymyde- "the. following specication 'l i Fig; 2 represents 55 ment'of the releasingfhandle 17 when the Toallfwhomz'tmay' comemy 'Beit known that .1, Enr E. oLLocn, a 'citizen of the AUnited States, residingat Chicago, in theco'unty of Cook and State .of

` 5 Illinois, have invented new and useful 'Imlprovements in Tire-Gages, of which. the following is a full, clear, conc1se,a'ndexact descriptlon, reference being had to the accompanying drawing forming a .part of this 10 Specification. l

v My invention relates'tov improvements in v for its. object the production of a device in which the pressure can lbe j quickly and a`ccurately obtained without 15 confusion of 4A further lobject-lis the production of device in which the reading is obtained without the aid of a spring# controlled-gage b ar. vThese.anda-such other objects as-may vbe` vice, embodiments of which are described in'` and fully Aset forth in the acompanying' d 1a.vv i11,g,`,- 'which-' Figure 1 represents 'afront elevation of; mydevice; i. d..

arear :elevation ofniy. devi'ce; device;

of the.;

Vtom Yand lose -capl15`et the top which#V may er. may not'be seizevv-tlgregdem-as` def' Ysired'.; A. slotlGLis forrin the upper halff of v th'efreaof the shell, topermit the vnievedeviceis muse.4

' A11 upper Fig.' 4 represets PQILSQiSY of then..v :thef

provided at the 7 tli air Tran-enen;

' Specification of Letters liurmnL' Patented Mar. 1917.

` -nppneaupn'med February 19,1917. serial 116.149,390.

' spring. contati-ning 'tube 18 is mounted within the'bar'r'el, ove'rf the top fof' .which is secured the cap 15 and Within which is mounted "the spring 19 extending 69 from the upper cap to the bottom 4of the de`. 'vice and surrounding' 'the' pistonfrod 20 which at its bottom head 21 inthe manner shown.l in Fig. 6.

Within the lower halfof the barrel is mount'- 65'v ed the indicating tube` 22 resting atfthe bot.

tom Y011 the top .of the `piston head .at 235 so 'that the upward movement. of the piston head carries the indicatoritube with it.

V' The indicator-tubef22 is' provided with 7 0 .arecess'portion 24 extending lengthwise of .the tube nwhich is placed .indicating-jnumbers 13.' The upper potionof theitube iS slotted at.its'frearformingl'a tongue 25 that is the releasing handle or button 17. This -spring'so formed 'is of sufficient strength to normallyt hold "the indicating tube'. in any position to which it n1 ay be-forcedby the upward movement of the. istonf The valve 80 opener 26 lits tightly-withm the-'main .barrel fat its bottom andrests on-the inturn'edflange 27 ofthe e en-cap 14. In4 F the openerisshown invertedg' '.Fig. '3 represents a'sectional 'view of my andthe valve-releasing stem v28 has'n open- "85;

Ing '2 9 communicating 'withjthe sloty 30lj'in.v

side wall. -1 f l A rubber ring orwasher SLSu'rroundsthe@ stem`28 forming a'cushionpi Y provide'a' central tube 3 2 vfittingmithin the sprin piston ro 20y in its upward movement;

In Fig-:9- I have shown a" [indicator bai-43' fel ,providedwith albossaiwpreteetfthe-g When-"tEeDartS- are assembled 9h-the various parts it 'snuglyto- 'g'efiher- ,The open endof thegage is-pressed bnithetop jof'tlie rim vs zlvel when 'tis de.

to the the rushes'into the openings 291a11d'301.V thevalveopening-26 and under the piston head 21, forcing it up the pressure of thespring'lQcai'i-ying the indicator bar--f rel 22.: 'Theben-relV Y' in the gage and a ITllm-,

' be r 13. appearing'tllrough the'wind0w or is-secured' to V'the iston n sprung outwardly andcarrying at'the top 75 Spring 33 formed clrcumferentially of the barrel' 9 5 menibe128V unseatsthe valve Vand 1ct' risesV until the pressure 1'10 -opening12 shows just what that' pressure is.

Only a single number appears, so there is no confusion' or uncertainty as to the pressure. When the gage is removed, the piston dropsback, forced by the spring, but the indicator tube'remains at its highest posir'tion, held there by the spring 25 and the pressure can be read without discomfort.

To bring the'indicator tube back into normal position, the button 17 vis pressed inwardly, thus releasing the pressure of the spring andthe barrel is. slid down by pressing downwardly'onl thebutton. It, is not essential to have thebutton on the spring member, butit makes a much better con-V struction.

'In my device, the pressuecan be read at any-time without stooping intoY an uncom- Afortable position and the indicator shows the-' pressure until the `indicator` tubeis manually slid back.

'By turning in the lip 27, I make it iml possible to force out the piston head or washer,vno matter how vhard the pressure applied. l d By the use of the open window with a .c single number exposed, I protect the indicator fr'om wear and increase its accuracy.l

The opening 'is preferably large enough so .thata number may always be read. Modifications are, of course, possible that still 'come within the scope of myinvention.

Iclaim: 1. A tire gage coJmprisingfan outer tubular shell, a cap fitting over the top thereof, a piston head :[itted within said shell and providedwith a piston rod, fa coiled springn surrounding the rod and bearing at one end off the cap and at the other end on'the piston, an ,indicator memberloosely seated on" the piston head and yslidable within said shell, said member bearing a pressure indieating scale, means below said piston head 'adapted to establish communication between the interior of the shell-and the interior of unseating means, a portion of said indicator -member being sprung outwardly and adapt- `a pneumatic tire and including tire valve ed to bear against the interior of said shell to hold said member in-indicating position j afterr said gage is removed from the tire valve, there being a small opening through said shell so positioned that the indicated pressure may be read, and means for returning said indicating member at will.

2. A tire gage comprising an outer tubular shell having a slot extending longitudinally at its upper portion, a cap iitting over the top thereof, a pistonhead fitted within said shell and provided with a piston rod, -a coiled spring' surrounding the rod and bearing at one end on the cap andv at the other end on the piston, an indicator member loosely seated on the piston head and slidable within said shell, said memberbearing a pressure indicating scale, means below said piston head adapte to establish communicationy between thev interior of the shell and the interior of a pneumatic tire and includl ing tire valve unseating means, a portion of said indicator member being sprung outwardly and adapted to bear 'against the inmanually returned to its non-registering position after a reading.

In witness whereof, I fhave hereunto sub- A. E. POLLOOK. 

